EP 3675921 A1 20200708 - IMPROVED RESORBABLE POLYMER PURIFICATION PROCESS
Title (en)
IMPROVED RESORBABLE POLYMER PURIFICATION PROCESS
Title (de)
VERBESSERTES REINIGUNGSVERFAHREN FÜR RESORBIERBARE POLYMERE
Title (fr)
PROCÉDÉ DE PURIFICATION DE POLYMÈRE RÉSORBABLE AMÉLIORÉ
Publication
Application
Priority
- US 201762552973 P 20170831
- US 2018049140 W 20180831
Abstract (en)
[origin: WO2019046748A1] The present invention is directed to an improved purification process using additive and activated carbon for purifying resorbable polymers suitable for industrial manufacturing. The metal catalyst concentration in the purified resorbable polymers of this invention is preferably less than 1 ppm. The method can be used to obtain high molecular weight polymers that are substantially metal free.
IPC 8 full level
A61L 27/00 (2006.01); C08F 6/12 (2006.01); C08G 63/08 (2006.01); C08G 63/64 (2006.01); C08G 63/85 (2006.01); C08G 63/90 (2006.01)
CPC (source: EP KR US)
C08G 63/08 (2013.01 - EP KR US); C08G 63/823 (2013.01 - KR); C08G 63/85 (2013.01 - EP US); C08G 63/90 (2013.01 - EP KR US); C08K 3/04 (2013.01 - US); C08K 5/09 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019046748 A1 20190307; CA 3073842 A1 20190307; CN 111032097 A 20200417; EP 3675921 A1 20200708; IL 272809 A 20200430; JP 2020532621 A 20201112; JP 7374081 B2 20231106; KR 20200044085 A 20200428; SG 11202001688W A 20200330; US 11261293 B2 20220301; US 2020190258 A1 20200618
DOCDB simple family (application)
US 2018049140 W 20180831; CA 3073842 A 20180831; CN 201880056110 A 20180831; EP 18778671 A 20180831; IL 27280920 A 20200220; JP 2020512551 A 20180831; KR 20207008756 A 20180831; SG 11202001688W A 20180831; US 201816643375 A 20180831